1320999967 has 12 divisors (see below), whose sum is σ = 1589663880. Its totient is φ = 1093240176.

The previous prime is 1320999961. The next prime is 1320999973. The reversal of 1320999967 is 7699990231.

It is an interprime number because it is at equal distance from previous prime (1320999961) and next prime (1320999973).

It is not a de Polignac number, because 1320999967 - 2³ = 1320999959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320999961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 463393 + ... + 466234.

It is an arithmetic number, because the mean of its divisors is an integer number (132471990).

Almost surely, 2^1320999967 is an apocalyptic number.

1320999967 is a deficient number, since it is larger than the sum of its proper divisors (268663913).

1320999967 is an equidigital number, since it uses as much as digits as its factorization.

1320999967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929670 (or 929663 counting only the distinct ones).

The product of its (nonzero) digits is 1653372, while the sum is 55.

The square root of 1320999967 is about 36345.5632367969. The cubic root of 1320999967 is about 1097.2382418590.

The spelling of 1320999967 in words is "one billion, three hundred twenty million, nine hundred ninety-nine thousand, nine hundred sixty-seven".